Just managed to run Uniswap app locally. How it can be useful? Remove all chains/tokens, add Exp.. so that it swaps Eth to Exp and back. Probably it's possible. But is it worth doing? I don't know. I tried this frontend hopefully to use it with RHC which would be a lot of work of course because RHC is not known to Metamask, as it's Substrate coin. However I was able to previously integrate Substrate with Metamask in one app (coins.room-house.com).